Bendix Commercial Vehicle Systems TU-FLO 750 COMPRESSOR 6/08 - Manual (Page 21)

21
4.0 Oil in Supply or
Service Reservoir
(air dryer installed)
(If a maintained Bendix ®
PuraGuard ® system fi lter
or Bendix ® PuraGuard ®
QC ™ oil coalescing
fi lter is installed, call
1-800-AIR-BRAKE
(1-800-247-2725) and
speak to a Tech Team
member.)
(a) If air brake charging system
m a i n t e n a n c e h a s n o t b e e n
performed.
That is, reservoir(s) have not been
drained per the schedule in Table
A on page 18, Column 4 and/or
the air dryer maintenance has not
been performed as in Column 3.
(b) If the vehicle maintenance has
been performed as recom-mended
in Table A on page 18, some oil in
the reservoirs is normal.
Drain all air tanks and check vehicle at next
service interval using the Bendix ® BASIC
test. See Table A on page 18, column 3 and
4, for recommended service schedule.
Drain all air tanks into Bendix ® BASIC test
cup (Bendix Air System Inspection Cup).
If less than one unit of reservoir contents
is found, the vehicle can be returned to
service. Note: If more than one oil unit
of water (or a cloudy emulsion mixture)
is present, change the vehicle's air dryer,
check for air system leakage (Test 2,
on page 29), stop inspection and check
again at the next service interval.
See the BASIC test kit for full details.
If less than one "oil unit" of water (or water/
cloudy emulsion mixture) is present, use the
BASIC cup chart on the label of the cup to
determine if the amount of oil found is within
the acceptable level.
If within the normal range, return the
vehicle to service. For vehicles with acces-
sories that are sensitive to small amounts
of oil, consider a Bendix
® PuraGuard ® QC ™
oil coalescing fi lter.
If outside the normal range go to
Symptom 4.0(c).
Also see the Table A on page 18, column
3 for recommended air dryer cartridge
replacement schedule.
Maintenance
(a)
Go to Test 2 on page 29.
See Table A, column 1, on page 18 for
recommended compressor sizes.
If the compressor is "too small" for
the vehicle's role (for example, where
a vehicle's use has changed or service
conditions exceed the original vehicle
or engine OE spec's) then upgrade the
compressor. Note: The costs incurred (e.g.
installing a larger capacity compressor, etc.)
are not covered under original compressor
warranty.
If the compressor is correct for the
vehicle, go to Symptom 4.0 (e).
Duty cycle too high
Symptom: What it may indicate: What you should do:
See Table A, on page
18, for maintenance
schedule information.
Drain all air tanks (reservoirs)
into the Bendix
® BASIC test
cup. (Bendix kit P/N 5013711).
The duty cycle is the ratio of time the compressor spends
building air to total engine running time. Air compressors
are designed to build air (to "run loaded") up to 25% of the
time. Higher duty cycles cause conditions that affect air
brake charging system performance which may require
additional maintenance. Factors that add to the duty cycle
are: air suspension, additional air accessories, use of an
undersized compressor, frequent stops, excessive leakage
from fi ttings, connections, lines, chambers or valves, etc.
(c) Air brake system leakage.
(d) Compressor may be undersized for
the application.